Question

O valor da expressão (A5,3+A6,5-A7,3)-(A10,7/A6,4)é:

Answer 1

Olá Dayanininanda

A(n,p) = n!/(n - p)!

A(5,3) = 5!/2! = 5*4*3 = 60
A(6,5) = 6!/1! = 720
A(7,3) = 7!/4! = 7*6*5 = 210 
A(10,7) = 10!/3! = 604800
A(6,4) = 6!/2! = 360 

A(5,3) + A(6,5) - A(7,3) = 60 + 720 - 210 = 570

A(10,7)/A(6,4) = 604800/360 = 1680 

570 - 1680 = -1110